Planoorapii co



D. Rx CAMPBELL.

TmMMmG MACHINE Eon RUBBER ARTICLES.

APPLICATION FILED JULY 29. 1918.

Patented July 1, 1919.

5 SHEETS-SHEET l.

THE COLUMBIA PLANOURAIH C0.. WASHINGTON. D. cA

D. R. CAMPBELL.

TRIMMING MACHINE FOR RUBBER ARTICLES.

APPLICATION FILED xuLY 29.1918.

1,308,479. Patented Ju1y1, 1919.

5 SHEETS-SHEET 2.

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/N VE-/V TDR:

il i i www@ THB COLUMBIA PLANDURAPII co., WASHINGTON, n. c.

n. RJCAMPBELL.

TRIMIVIING MACHINE FOR RUBBER ARTICLES.

11 July 1, 1919. EET`S*SHEET 3.

ATT ys- Patente l NVENTW;

x/,I ma? APPLICATION FILED lULY 29. |918. 1,308,479.

D. B. CAMPBELL.

TRIMMINIB MACHINE FOR RUBBER ARTICLES. APPLICATION FILED JLILY29, 1918. 1,808,479. Patented 11115111919.

5 SHEETS-SHEET I-A 1321 y J8 L a :loJ

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D. R. CAMPBELL.

TRINIMING MACHINE FOR RUBBER ARTICLES.

APPLICATION FILED IULYVZQ. I9I8. 1,308,479. y PatentedJulyl, 1919.

5 SHEETS-SHEEI 5.

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'rlm COLUMBIA PLANOORAPH co., WASHINGTON, n. C.

stains Parent ortie Duncan it. cnil/trennt, or

marittime-MACHINE ron nonnen. aerienne..` i y i.,

Bo'sroii, iwassaoi-insnfrifs,hssidita To tRiSiii nnifiniLL, or NEWTON, MASSACHUSETTS. i

To (all whom/t 11mg/ concern Be it knownfthat I, DUNCAN R. CAMPBELL, a subject of the Dominion pf Canada, residing at Boston, in, the county of Suffolk and State `of Massachusetts, have invented new and useful,Improvements in Trimming-Machines for Rubber Articles, of which the following is a specification.

This 'invention relates to `machines for removing the overhang or fin, from articles suehas molded rubber heels for boots and shoes, `and it is embodied in the improvements which l will now proceed to describe and claim. i

Of the accompanying drawings forming a part of this specifioationr- Figureil is a top plan view of a machine embodying the invention.

Fig. 1a is a plan view of the machine with the upper portion removed.

Fig; 2 is a side elevation, partly in section.

Fig. 2'EL is a detail hereinafter referred to.

Fig. 3 is `an end view of the machine. Fig. 3a is a sectional view of the `pressure roll. y y

Fig. 4 is a section on line 4&4 Iof Fig. 1.

Fig.` 5 isa section on linei55 `of Figql.

Fig. 6 is a section on line 6-6of Fig. 1.

Figi 7 is a section on line `7--7 of Fig. 1.

Fig. 8 isa section on line 8-8 of Fig. 1.

Fig. 9 is a perspective view of one of the parts of the machine.

Fig. 10 is a section on line 10-10 of Fig. 6.

Fig. 1-1 is a fragmentary View herein after referred to.

Figs. 12 and 13 are fragmentary vertical sections show-*ing different positions, `the slide hereinafter described,` and certain'details of mechanism associated therewith.`

Fig. 14 is a view showing in section a portion of the `frame below the slide and parts of the operating mechanism.

Fig. 15 is a fragmentary plan View, certain parts being remo-ved.

Fig. 15a is a fragmentary perspective view showing details.

Figs. 16 and 17 are fragmentary sectional views showing details.

`Figs. 18 `and l19 are fragmentary views showing other details. y

Fig 20 is afragmentary sectional view showing aportion-of the frame;y i

and` is provided with a` gear porting frame;

\ nected at 29 with the gear `to the housing 12.

\ on a fixed stud 35 on the frame.

necting gear 84 is of sufficient width to mesh Sipccatoil of Letters at'ent. Pitnted 1a i919. Appliation filed July 29, 1918.

serial No. 247,161.

Fig. 22 is a sectional view showing `the heel in the die.

In the drawings, 10` represents a frame having suitafble supports or legs 11. `The frame 10 is provided with housings 12 which support a roll 13 mounted o'n ashaft .14 Journaled in bearings 15, 15 adj ustably supported relatively tothe bed by. `screws 16 Fig. 4) and confined against said suopo'rting screws by bearing screws 16a. f) sion is thus made ii'or vertically adjusting the rollto enable it to coperate with `variously proportioned cutting dies of the character hereinafter described;

The bed `is provided with suitable guide- `ways 17, in which is' mounted afslide 18. Saidjslide is provided with lugs 19 (Figs. `5 and 6) having-bearings for a `wrist-pin"20, on which is mounted a journal-box 21 `(Fig. 2) engaging a slot in the` upper end of a pitman 22, the lower end of which is loosely mounted on the driving-shaft 23.

' provided with la driving pulley 24:, releasably connected with the shaft by a clutch mechanism, `hereinafter referred to.

As shown in Figs. 1 and 3, the driving pulley is formed to engage a dri-ving belt, 24a. To the shaft 23 is keyed a small gear or `pinion 25, meshing with a largergear 26 (Figs. 2, 2a andl 8), mounted on a stud 27, on the sup- Thegear 26 oscillates the pitman 22 through a link 28 (Fig.2)` con- `andfat 29a with the pitman.

Attached to the slide 18 is a rack 30 which meshes with a primary gear 31 4journaled on a fixed sleeve or tubular `external `bearing 32 (Fig. 9), formed ya casting 33, bolted The primary `gear 3l meshes with a' connecting gear 34 journaled The conwith thegear 31 andwith a secondary gear 36. keyed to the Nroll shaft 14, so that the connecting gear transmits motion to said shaft, land through the latter to the roll 13. Vertical adjustments of the roll `without afnumber.

fecting the engagement of the gear 31 with the rack 30 are permitted, by reason o-f the fact that the inner dia-meter of the sleeve 32 is greater than that of the roll shaft 14, so -that a space 37 is provided for adjustments of the roll shaft, as clearly shown v lar die blocks'39 and 40 (Figs. 1 and 3), the

inner edges of which are formed to receive thedie sections 38, 38, forming an expansible and contractible cutting die, and secured to the block by screws, as shown in Fig. 5. These die blocks are adapted to be mio-ved inwardly to close, and outwardly to open the die formed by said sections.

The die is normally open to receive the heel 87 vto be trimmed, and is automatically cl'osed when it passes from its starting position shown by Fig. 1, under the pressure roll 13. After the die passes the roll it is automatically opened to permit the heel to be easily ejected before the die returns to its starting position. The means for opening and closing the die will be next described.

In Fig. 11 the slide 18, die blocks 39 and 40, and parts of the bed 10 are shown in dotted lines. The slide has recesses in its upper surface to provide seats for crank disks 41, 41. 42, 42. (Fig. 1a), preferably four in Said disks are provided with eccentric wrist-pins 43, 43, 44, 44, and rock shafts 45, 46. Said shafts are journaled in and extend through the slide, and the shafts 45 are provided with crossed arms 47. 48, at their lower ends, extending inwardly, in opposite directions, and curved laterally at their free ends to engage a spring 49 (Fig. 1), which exerts pressure upon the shafts 45 to turn the wrist-pins 43 outwardly and cause said pins to hold the die blocks in the open position of the die. The die blocks are also engaged by the wrist-pins 44, 44 to effect the closing of the die blocks as next described.'

The shafts 46. 46, are provided with arms 50, 5l) (Figs. 13 and 14), the free ends of which carry rolls 51. Said rolls are adapted to be engaged by cam strips 52, to close the die before-the latter passes forward under the pressure roll. This is eiected by movement of the rolls 51 on the oblique end faces 53 and on the longitudinal straight edge faces 54 of the two cam strips 52,'the camstrips acting' through the crank disks 42 and wrist-pins 44 to close the die carriers against the tension of the die opening spring 49.

The cam strips 52 have oblique end faces 55 at their opposite ends, so that when the die has passed under the; roll 13, andthe heel has been trimmed, the rolls 51 may follow the faces 55 which permit the die to be opened by the spring 49.

The cam strips 52 are loosely and adjustably secured to the bed 10 by bolts 56 (Fig. 20). Said bolts are of smaller diameter than the openings 57u through which they pass, so that the strips may be laterally adjusted, by means including rock shafts 57 (Fig. 18) journaled in fixed bearings in the frame 10 and having eccentrics 57a bearing on the imier or rear edges of the cam strips, as clearly shown in Figs. 13 and 14. The rock shafts 57 are provided at their lower` ends with arms 58 (Figs. 1a and 18), the free ends of which are pivoted to links 59 secured to the frame by bolts 60, which engage curved slots 60a in the links corresponding to the radius of the arms 58, so that when an endwise movement is imparted to the links by hand, or otherwise, the rock shafts 57 are turned in their bearings, and the eccentrics 57a are correspondingly turned to laterally adjust the cam strips 52, (see Figs. 14, 17 and 18). The object of the lateral adj ustability of the cam strips is to enable dies of different sizes to be used interchangeably.

The heel blank 87 in the present instance, is double (Figs. 21 and 22), and after being trimmed, is divided at the center on the dotted line in Fig. 21, into two heels, but single heels can be treated by suitably forming the. die. Als hereinbefore stated, the die after passing` under the pressure roll 13, is automatically opened. and then the heel is ejected therefrom by means best shown in Figs. 5, 6, 10, 12 and 16.

Fig. 12 shows a section through the center of the slide 18, one of the lugs 1f) being broken away at y, y for clearness, and the .lower portion of said lug being shown in elevation. In this figure the slide 18 is at the end of its forward movement, and in Fig. 6. it is in its initial or starting position. Then the heel is placed in the die, it rests upon a supporting or ejector plate 61 (Fig. 5). Said plate is adjustably supported by means including plungers 62, projecting downwardly through the slide into the space 63. between the lugs 19. To the lower ends of the plungers 62 is secured a plate 64, resting on arms 65, on rock shafts 66, journaled in bearings in the lugs 19.

Each of the rock shafts 66 is provided with an arm 67. are pivoted the ends of a connecting link 68 (Fig. 6). On one end of the link 68 is mounted a disk 69, the arrangement being such that when the slide moves to the position shown in Fig. 12, the disk 69 engages a fixed abutment 70 at one end portion of the frame, causing the ejector plate to rise and raise the heel, as shown in Fig. 12, the plate 61 being raised slightly above the edge of the die, so that when the latter is moved to- Figs. 5 and 6,

i noname ivard the pressure roll upon lthe "return stroke, the heel resting on the :platter as shown in dotted liiies'l'in F 12, v'viill fen-` counter` a"scraper 7l, secured to the" `housing traine at the rear of tlieyroll,ivliichlscraper removes the "heel `trointhe die. "The sc 'aper l has been oinitted from Fig. lato avoid `coiii fusion. The abutment is `in thetpath of the dish 69,` and contacts with the latter j ust before the completion of tliefforvraird `nuovenicntof the slide.

Itis necessary to provide ineanstoinaintain the ejeeting plate `in its elevated posi `tion when, onftlie return stroke ioi'itlreslide, the disk `(39 is separated from the abutinent i '70,` so that `there Will heno liability-ofthe heel-dropping into `the diebeforethescraper y operates `to remove the lieelifroin the die.`

Torthis end ll"p`roivide la friction device in one `of the lugs 119,viv`hich device includes a spring-pressedfpin or detent 72 (ling.` r16), projectingdroin the lug into the-path" of one ot thearnisbiso that it urnav `engage said" arm `when `theilatteryis swung' to iejecting position by the engagement ofthe dislr69 with the abutineiitTO, `shovvii in Figs. 1Q andlG. i

The pin 7'2 is `provided Witlr head (Fig.

16) which rests against` a spring 74; "lcated in a `bore 75 in the lng 19," vvhich"ib0re `is screw-threaded to receive a bushinglvvvhich holds the pin" against displacenientiby; the spring.` w v l i The arin 617 with `"vvlfiich the `piiiqengages r has a slight depressionZ'; iniivhichtlie outer L rounded i end of @the pinlinayrest, as shown may be a rod` screwed `tothebed;` inpos'iti'on 2B is connected `with 1the drivingjpulley 24 iroin the pin and connect'the clutchiviththe "driving-shaitf Any suitable type of clutch iii-ay be used for tlierpurpfose described S3 (Fig. 2) represents aiiwfarin foiqiiiedon the treadleshaft and having a `roll84 at its upper or tree end. `Said rollislatlaptedto be engagedby a cani 85 .attached to thegear the arrangeinent.being` such that when `the treadle is depressedthe arm is raised,

ile-ej ecting roll and retains the connection between the c'liiitcliif` and driving-shaft untill the slide has returned to its starting position. Vllieii the rolil hasccased to engage the cani, the clutch is"di`sen`gagcd from the shaft.

` Operation.

" tlieicoperation ci the cani strip iaces 53 `and rolls F51, before the advancing end of the die `1"ea=c'liestlie roll, the `heel being therefore closely confined during the triinniing opel ation. When the die has passed under the roll, the die sections are opened by the cobperatioii ofthe cani" faces 55,` rollsll, spring 49, fand zithe described intermediate ineclianisiiniandtlie ejector is raised to elevate the heel, andwreniains raised `until the trimmed Aheel has been removed and the slide `nearly `reaches its starting position. The ejector is `their released and depressed; to enablethe die" toreceiveanother heel. The diameter oi the roll 118 isequal to the pitch diaineter of the i gears v3l and 36. This relation betweentlie roll andgeai and the rtationoi the gears `bytl`ijeirack"30 attached to the slide, cau-se the periphery` oi. the roll andthe cutting edges of the die sections to inove atthe saine rate @of speed,"so that `the overhang or iin is triniined accurately and sniootlily; "The roll 1B :is preferably provided With a `flexible and slightlyyielding face, forinied` by `applying aWbed layer 87 olf coinpressible sheet inateriah siicliascanvas, to a portion "olfgtheperiphery ofthe roll body and supcrliinposingvaacing` layer 88 of thin sheet o e e e *steelypreferably of`20 gage, on the bed layer to engage a pin 86 on" thelinlfandcausexthe Varni" G'Trrto beidisengaged frein `the springpressed detent, as clearly shown in Fig.

As herein-before statedythe driving-shaft 87. "Said layers constitute the `portion of the die, `aiidinay be secured to the roll by screws The `:Flexible and .yielding facethus pro ,vided `compensates for inequalities in `the `height of the cutting edges of the die and "irriprovcs the "trimming operation.

"I claiin:

` niacliine of the character stated, coinlprising a traine having guides, a slide niov- `able on said guides,a trimming die carried bythe slide, a rotarylpressnre roll adapted `to coperate with said `die and adjustable relatively thereto, the `traine being provided ivithnieans permitting adjustments the roll toward and troni the slide,\1neans` for v reciprocating the slide, and torque-transinittiiig"` connections between the slide and roll, including `a rack attached wto the slide,

``a`pi'iinary1 gear meshing with the rack and p having a ffixed aXisfa secoiidai'vfgear atand the clutch is in loperativepositiontoi'os tatethe shaft. The cam surface engages the `[tai'ilied totheroll and adjustfb herewith.,

ondary gear.

eter, and a connecting gear 'having a fixed axis and meshing with said primary and secondary gears.

2. A machineof the character stated, comprising a frame having guides, a slide movable on said guides, a trimming die carried by the slide, a rotary pressure roll adapted Y to coperate with said die and adjustable eter, and the roll having a diameter equal to that of the said pitch lines, and a connecting gear having a lixed axis and meshing with said primary and secondary gears.

3. A machine of the character stated, comprising a frame having guides, a pair' of ad- Vjustable internal bearings, and a xed external bearing, a slide movable on said guides, means for reciprocating the slide, a trimming die, carried b v the slide, a pressure roll havinga shaft journaledin said adjustable bearings and adapted to coperate with said die, and means for rotating the roll, said means including a rack attached to the slide, a primary gear journaled on said rfixed bearing and meshing with said rack, a secondary gear attached to. the roll shaft, and located beside the primaryy gear, f

said primaryand secondary gears being of equal diameter, anda 'connecting gear having a fixed axis and meshing with the primary and -secondary gears, the said 'fixed' bearing being formed to permit lateral movements of the roll, itsk shaft, and the sec- 4. A machine of the character stated, comprising a frame having guides, a slide mov- A able on said guides, die blocks mounted on the slide and movable. relatively to each other, die sections attached to said blocks and relatively movable thereby tok expand and contract the die formed by said sections, means for reciprocating the slide, torquetransmitting connections between the slide and roll, and means actuated by movements of the slide for relatively moving said die blocks to expand and contract thedie.

5. A machine of the character stated, comprising a frame having guides, a slide movable on said guides, die blocks mounted on the slide and movable relatively to each other, die sections attached to said blocks and relatively movable thereby to expand and contract the die formed by said sections, means for reciprocating the slide, torquetransmitting connections between the slide land roll, means actuatedrby movements of the slide for relatively moving said die blocks to expand and contract the die, an

lejector movable within the die, and means oblique end faces 53 and 55, a pair of rock shafts journaled in the slide and having eccentric wrist-pins engaged with the die blocks and arms provided with rolls arranged to bear on the faces of the cam strips, and means for yieldingly pressing said rolls against the cam strips, the arrangement befiiig such that during the forward movement of the slide the arms are first moved inwardly by the faces 53 to contract the die, then held in die-contracting position by the longitudinal' faces, and then permitted by 'the faces 55 to move outwardly and expand `the die.

7. A machine of the character stated, comprising a frame havino guides, a slide movable on said guides, die blocks mounted on the slide yand movable relatively to each other, die sections attached to said blocks and `relatively movable thereby to expand and contract `the die formed by said sections, vmeans for rciprocating the slide, torque-transmitting connections between the slide and roll, a pair of oppositely facing cam strips secured to the frame and provided with straight longitudinal faces and with oblique end faces 53 and 55, a pair of rock shafts journaled in the slide and having eccentric wrist-pins engaged with the die blocks and arms provided with rolls arranged to bear ,on the faces of the cani strips, another pair of rock shafts journaled in the slide and having eccentric wrist-pins engaged with the die blocks and arms 47 and 48 connected by a spring 49, adapted to act through the last-mentioned arms, rock shafts and Wrist-pins to press the said rolls against the cam strips.

8. A machine of the character stated, comprisingE aframehaving guides, a slide movable on said guides, die blocks mounted on the slide and` movable relatively to each other, die sections attached to said blocks and relatively movable thereby to expand and contract the die formed by said sections,

and roll, means actuated. by movements of yieldingly engage said supportingl means and confine the ejector plate in a raised posi tion, and a' fixed abutment at the opposite end portion of the frame adapted to disengage the supporting means from said detent and permit the depression of the ejector,

plate.

9. A machine of the character stated, comprising a frame having guides, a slide movable on said uides, die blocks mounted on the slide and movable relatively to each other, die sections attached to said blocks and relatively movable thereby to expand and contract the die formed by saidsections, means for reciprocating the slide, torquetransmitting connections between the slide and roll, a pair of oppositely facing cam strips secured to the frame and provided with straight longitudinal faces and with oblique end faces 53 and 55, a pair of rock shafts journaled in the slide and having eccentric Wrist-pins engaged with the die blocks and arms provided with rolls arranged to bear on the faces of the cam strips, means for yieldingly pressing said rolls against the cam strips, the said strips being loosely connected with the fralne to permit their lateral adjustment and a variation of the distance between them, and means for laterally adjusting the strips and maintaining them at various adjustments.

strips secured to the frame and provided with straight longitudinal faces and with oblique end faces 53 and 55, a pair of rock shafts journaled in the slide and having eccentric wristfpins engaged with the die blocks and arms provided with rolls arranged to bear on the faces of the cam strips, means for yieldingly ressing said rolls against the cam strips, tlie said strips being loosely connected with the frame to permit their lateral adjustment and a variation of the distance between them, and means for laterally adjusting the strips and maintaining them at various adjustments, said means including rock shafts 57 journaled in the frame, and provided with eccentrics 57'@L bearing on the backs ofthe cam strips, and with arms 58, links 59 connecting said arms, and each provided with an arcuate slot, and fixed studs on the frame entering said slots.

l1. In a machine of the character stated, in combination, an elongated trimming die, and a rotary pressure roll adapted to coperate with the die and comprising a rigid body, a flexible hard metal facing layer contacting With the die, and a bed layer of compressible material interposed between said facing layer and body. j

In testimony whereof I have ailixed my signature.

DUNCAN R. CAMPBELL.

@epics of this patent may be obtained for ive cents cach,`by addressing the Commissioner of Patents,

Washington, 1D. C. 

